Title (en)

BORING BIT COMPONENT WITH HARD FACE WEAR RESISTANCE MATERIAL WITH SUBSEQUENT HEAT TREATMENT

Title (de)

BOHRKRONENBAUTEIL MIT HARTEM VERSCHLEISSFESTEM MATERIAL MIT ANSCHLIESSENDER WÄRMEBEHANDLUNG

Title (fr)

ÉLÉMENT DE TRÉPAN DE FORAGE DOTÉ D'UN MATÉRIAU DE RÉSISTANCE À L'USURE À SURFACE DURE À TRAITEMENT THERMIQUE ULTÉRIEUR

Publication

EP 3953086 A1 20220216 (EN)

Application

EP 20787108 A 20200328

Priority

• US 201962833283 P 20190412
• US 2020025562 W 20200328

Abstract (en)

[origin: US2020325584A1] A boring bit or other component for horizontal directional drilling is provided which includes a hard faced layer that is preferably made by a laser cladding bead. A subsequent or post heat treatment is applied to modify the heat affected zone (HAZ) to eliminate or reduce the hard brittle regions and/or softer regions in the base iron or steel material of the HAZ. Further, the hard faced layer may be applied in combination with carbide insert teeth that are embedded within the steel base of the boring bit body, such as by press fitting.

IPC 8 full level

B23B 51/00 (2006.01); B23B 39/02 (2006.01); B23K 26/342 (2014.01); B23P 15/28 (2006.01)

CPC (source: EP US)

B23K 26/34 (2013.01 - EP); B23K 31/025 (2013.01 - EP); C21D 6/00 (2013.01 - EP); C21D 9/22 (2013.01 - EP US); C22F 1/10 (2013.01 - EP US); C22F 1/18 (2013.01 - EP US); C23C 24/103 (2013.01 - EP); C23C 26/00 (2013.01 - US); C23C 26/02 (2013.01 - EP); E21B 7/046 (2013.01 - US); E21B 10/46 (2013.01 - EP US)

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

US 11987889 B2 20240521; US 2020325584 A1 20201015; CA 3136612 A1 20201015; EP 3953086 A1 20220216; EP 3953086 A4 20230301; WO 2020210063 A1 20201015

DOCDB simple family (application)

US 202016833555 A 20200328; CA 3136612 A 20200328; EP 20787108 A 20200328; US 2020025562 W 20200328